From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752487AbZIOJgR (ORCPT ); Tue, 15 Sep 2009 05:36:17 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752329AbZIOJgP (ORCPT ); Tue, 15 Sep 2009 05:36:15 -0400 Received: from hera.kernel.org ([140.211.167.34]:57420 "EHLO hera.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752012AbZIOJgO (ORCPT ); Tue, 15 Sep 2009 05:36:14 -0400 Date: Tue, 15 Sep 2009 09:35:39 GMT From: tip-bot for Ingo Molnar Cc: linux-kernel@vger.kernel.org, acme@redhat.com, paulus@samba.org, hpa@zytor.com, mingo@redhat.com, a.p.zijlstra@chello.nl, efault@gmx.de, fweisbec@gmail.com, tglx@linutronix.de, mingo@elte.hu Reply-To: mingo@redhat.com, hpa@zytor.com, paulus@samba.org, acme@redhat.com, linux-kernel@vger.kernel.org, fweisbec@gmail.com, a.p.zijlstra@chello.nl, efault@gmx.de, tglx@linutronix.de, mingo@elte.hu In-Reply-To: References: To: linux-tip-commits@vger.kernel.org Subject: [tip:perfcounters/core] perf_counter, sched: Add sched_stat_runtime tracepoint Message-ID: Git-Commit-ID: f977bb4937857994312fff4f9c2cad336a36a932 X-Mailer: tip-git-log-daemon MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.0 (hera.kernel.org [127.0.0.1]); Tue, 15 Sep 2009 09:35:39 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: f977bb4937857994312fff4f9c2cad336a36a932 Gitweb: http://git.kernel.org/tip/f977bb4937857994312fff4f9c2cad336a36a932 Author: Ingo Molnar AuthorDate: Sun, 13 Sep 2009 18:15:54 +0200 Committer: Ingo Molnar CommitDate: Sun, 13 Sep 2009 18:17:28 +0200 perf_counter, sched: Add sched_stat_runtime tracepoint This allows more precise tracking of how the scheduler accounts (and acts upon) a task having spent N nanoseconds of CPU time. Cc: Peter Zijlstra Cc: Mike Galbraith Cc: Paul Mackerras Cc: Arnaldo Carvalho de Melo Cc: Frederic Weisbecker LKML-Reference: Signed-off-by: Ingo Molnar --- include/trace/events/sched.h | 33 +++++++++++++++++++++++++++++++++ kernel/sched_fair.c | 1 + 2 files changed, 34 insertions(+), 0 deletions(-) diff --git a/include/trace/events/sched.h b/include/trace/events/sched.h index b48f1ad..4069c43 100644 --- a/include/trace/events/sched.h +++ b/include/trace/events/sched.h @@ -380,6 +380,39 @@ TRACE_EVENT(sched_stat_wait, ); /* + * Tracepoint for accounting runtime (time the task is executing + * on a CPU). + */ +TRACE_EVENT(sched_stat_runtime, + + TP_PROTO(struct task_struct *tsk, u64 runtime, u64 vruntime), + + TP_ARGS(tsk, runtime, vruntime), + + TP_STRUCT__entry( + __array( char, comm, TASK_COMM_LEN ) + __field( pid_t, pid ) + __field( u64, runtime ) + __field( u64, vruntime ) + ), + + TP_fast_assign( + memcpy(__entry->comm, tsk->comm, TASK_COMM_LEN); + __entry->pid = tsk->pid; + __entry->runtime = runtime; + __entry->vruntime = vruntime; + ) + TP_perf_assign( + __perf_count(runtime); + ), + + TP_printk("task: %s:%d runtime: %Lu [ns], vruntime: %Lu [ns]", + __entry->comm, __entry->pid, + (unsigned long long)__entry->runtime, + (unsigned long long)__entry->vruntime) +); + +/* * Tracepoint for accounting sleep time (time the task is not runnable, * including iowait, see below). */ diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c index aa7f841..a097e90 100644 --- a/kernel/sched_fair.c +++ b/kernel/sched_fair.c @@ -513,6 +513,7 @@ static void update_curr(struct cfs_rq *cfs_rq) if (entity_is_task(curr)) { struct task_struct *curtask = task_of(curr); + trace_sched_stat_runtime(curtask, delta_exec, curr->vruntime); cpuacct_charge(curtask, delta_exec); account_group_exec_runtime(curtask, delta_exec); }